'Gwynne Jones' entertaining take on his beloved Venice is as delightful as a Spritz by the Rialto - a must for all Italy lovers' David Hewson A game of blackmail and betrayal is played among the backstreets and canals of Venice . . . Carnevale is in full swing, the streets and waterways of Venice are crowded with masked revellers and Nathan Sutherland's birthday is about to be ruined. A night at the opera...